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P0400 Diagnostic Trouble Code Discussion for August 2007

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1997 Mazda 626 LX 2.5L MIL Lamp on VIN: 1YUGE22D9V
P0400: EGR System Flow Malfunction. p0400 egr malfunction. we have replaced the egr and egr boost sensor. have tested egr vent solenoid and egr vent vacuum solenoid. boost sensor was replaced as per tsb. we have cleaned egr ports and checked and doublechecked all vacuum lines. we have gone throu...
August 14, 2007
2001 Mazda Millenia 2.5L MIL Lamp on VIN: JM1TA22161
P0400: EGR System Flow Malfunction. Help Mazda techs! This mazda has an on going issue with mil/ egr issues. We have never duplicated a malfuntion in the system but customer has opted for a new valve and soleniods. All passages are clear- vacuum is good- with new parts car went approx 3 weeks wi...
August 15, 2007